Home / 20,107.42-27,748.31-11,155.10

Finding the Fourth Proportional to 20,107.42, 27,748.31 and 11,155.10

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Solution

The fourth proportional to 20,107.42, 27,748.31 and 11,155.10 is: 15,394.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.42 : 27,748.31 = 11,155.10 : x
  2. Step 2: Convert to fraction form
    20,107.42/27,748.31 = 11,155.10/x
  3. Step 3: Cross multiply
    20,107.42x = 27,748.31 × 11,155.10
  4. Step 4: Simplify right side
    20,107.42x = 309,535,172.88
  5. Step 5: Solve for x
    x = 309,535,172.88/20,107.42
  6. Step 6: Final answer
    x = 15,394.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.